Skill level question

I’ve been looking at the IUF/USA skill levels, and I’ve got a question
for one of the skills for level 3, namely, to ride over a 10x10 cm
obstacle. Shouldn’t there be one more dimension there? Is it a cube, or
a log, or what?

Daniel Alt - Case Western Reserve University Cleveland, Ohio (Help Me!) I’m
sorry, my carma just ran over your dogma |Incorrigible Punster I’m not tense,
just terribly alert | Don’t Incorrige Immanuel doesn’t pun, he Kant |